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A federal judge sentenced a former Arkansas judge Wednesday to five years in prison — a stiffer punishment than prosecutors recommended — after he admitted giving young male defendants lighter sentences in return for personal benefits that included sexual favours.

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Four years jail for WA fatal car crash

A 20-year-old Perth man who was fleeing the scene of a robbery when he crashed a car into another vehicle driven by his friend, killing him, has been jailed for more than four years.

Bradley Ross Taylor pleaded guilty to seven charges including dangerous driving occasioning death, failing to stop, failing to render assistance, driving an unlicensed vehicle, driving with a blood-alcohol level in excess of .05 per cent, and being an accessory to robbery and assault.

The Perth District Court heard on Thursday that Taylor and the victim, Gavin Fryer, drove in separate cars to Point Walter Reserve in Bicton where Mr Fryer assaulted a man and stole his bicycle.

The pair placed the bicycle in the vehicle Taylor was driving and sped away in different directions - Taylor in a Commodore and Mr Fryer in an Astra.

Taylor was briefly pursued by police and later failed to halt at a stop sign when he crashed into his friend.

"Tragically, the two of you came together in a collision," Judge Philip Eaton said in sentencing.

The force of the impact caused both cars to leave the road and the victim's vehicle struck a tree.